A slowing economy leads rating agencies to downgrade loans. Since Collateralized Loan Obligations (CLOs) have strict limits on lower-rated debt, they become forced sellers. This flood of supply depresses prices further, creating a negative feedback loop that harms even fundamentally sound but downgraded assets.

The credit market appears healthy based on tight average spreads, but this is misleading. A strong top 90% of the market pulls the average down, while the bottom 10% faces severe distress, with loans "dropping like a stone." The weight of prolonged high borrowing costs is creating a clear divide between healthy and struggling companies.

Unlike equities, credit markets face a growing risk from the AI boom. As companies increasingly use debt instead of cash to finance AI and data center expansion, the rising supply of corporate bonds could pressure credit spreads to widen, even in a strong economy, echoing dynamics from the late 1990s tech bubble.

The high-yield bond market is now nearly 60% BB-rated, a significant quality improvement over the last decade. Risk has instead concentrated in the lower-quality, B-rated leveraged loan and direct lending markets, making high-yield spreads an unreliable gauge of overall credit stress.

Tech giants are issuing massive amounts of highly-rated debt at a discount to fund AI expansion. This makes existing, lower-rated corporate bonds from other sectors look less attractive by comparison, forcing a repricing of risk and higher borrowing costs across the credit spectrum.

The traditional two-tier credit market (investment grade and high-yield) has evolved. A new four-tier hierarchy of credit quality now exists: Investment Grade, High Yield, Leveraged Loans, and finally, Private Credit, which has absorbed the riskiest deals that cannot find financing in the other markets.

Unlike the dot-com bubble's weak issuers, the current AI debt boom is driven by investment-grade giants. However, the risk is that these stable companies are using debt to finance speculative, 'equity-like' technology ventures, a concerning trend for credit investors.

The high-yield market's credit quality is at an all-time high, not due to broad economic strength, but because of a massive influx of 'fallen angels.' Downgrades of large, formerly investment-grade companies like Ford and Kraft Heinz have structurally improved the overall quality of the index.

A significant shift in corporate finance strategy has occurred: companies no longer universally strive for an investment-grade (IG) rating. Many firms, including 'fallen angels' downgraded from IG, are content to operate with a high-yield rating, finding the higher borrowing costs acceptable for their business models.